Abstract:Research on phase shifting technology and instrument were carried on, which was applied in a high voltage and current source with tunable power factor for the calibration of transformer loss measurement system (TLMS). The instrument was based on Hilbert Transform. Input signal was convolved to generate a quadrature signal, and then the output signal with required phase was generated with vector synthesis method. Based on the aboved research, a phase shifting device was built with Compact RIO platform. Meanwhile, a phase difference measurement instrument was developed, which combined signal acquiring and processing technology of Compact RIO and LabVIEW platform. Resolution and stability of the phase shifting device were also verified by a commercial phase angle voltmeter Clark-Hess 2600. The experimental results show that resolution, stability, and accuracy of the system resolution are all better than 0.001°.
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